HOST_SYSTEM = $(shell uname | cut -f 1 -d_)
SYSTEM ?= $(HOST_SYSTEM)
CXX = g++
CC = gcc
CPPFLAGS += `pkg-config --cflags protobuf grpc`
CXXFLAGS += -std=c++11
INC = -I.. -I../include
ifeq ($(SYSTEM),Darwin)
LDFLAGS += -L../lib -pthread -lprotobuf -lgrpc++ \
	   -lgrpc++_reflection\
	   -ldl -lgflags -laudio_streaming_client
else
LDFLAGS += -L../lib -pthread -lprotobuf -lgrpc++ \
	   -Wl,--no-as-needed -lgrpc++_reflection -Wl,--as-needed\
	   -ldl  -laudio_streaming_client -Wl,-rpath=../lib
endif
PROTOC = protoc
GRPC_CPP_PLUGIN = grpc_cpp_plugin
GRPC_CPP_PLUGIN_PATH ?= `which $(GRPC_CPP_PLUGIN)`

all: system-check client_demo client_demo_multi_thread client_demo_c

sha256.o : sha256.c
	$(CC) -c $^ $(LDFLAGS) $(INC) -o $@

client_demo_c.o : client_demo_c.cc
	$(CC) -c $^ $(LDFLAGS) $(INC) -o $@

client_demo_c: sha256.o client_demo_c.o
	$(CC) $^ $(LDFLAGS) $(INC) -o $@

client_demo: client_demo.cpp
	$(CXX) $^ $(CXXFLAGS) $(LDFLAGS) $(INC) -o $@

client_demo_multi_thread: client_demo_multi_thread.cpp
	$(CXX) $^ $(CXXFLAGS) $(LDFLAGS) $(INC) -o $@

clean:
	rm -f *.o client_demo_c client_demo client_demo_multi_thread


# The following is to test your system and ensure a smoother experience.
# They are by no means necessary to actually compile a grpc-enabled software.

PROTOC_CMD = which $(PROTOC)
PROTOC_CHECK_CMD = $(PROTOC) --version | grep -q libprotoc.3
PLUGIN_CHECK_CMD = which $(GRPC_CPP_PLUGIN)
HAS_PROTOC = $(shell $(PROTOC_CMD) > /dev/null && echo true || echo false)
ifeq ($(HAS_PROTOC),true)
HAS_VALID_PROTOC = $(shell $(PROTOC_CHECK_CMD) 2> /dev/null && echo true || echo false)
endif
HAS_PLUGIN = $(shell $(PLUGIN_CHECK_CMD) > /dev/null && echo true || echo false)

SYSTEM_OK = false
ifeq ($(HAS_VALID_PROTOC),true)
ifeq ($(HAS_PLUGIN),true)
SYSTEM_OK = true
endif
endif

system-check:
ifneq ($(HAS_VALID_PROTOC),true)
	@echo " DEPENDENCY ERROR"
	@echo
	@echo "You don't have protoc 3.0.0 installed in your path."
	@echo "Please install Google protocol buffers 3.0.0 and its compiler."
	@echo "You can find it here:"
	@echo
	@echo "   https://github.com/google/protobuf/releases/tag/v3.0.0"
	@echo
	@echo "Here is what I get when trying to evaluate your version of protoc:"
	@echo
	-$(PROTOC) --version
	@echo
	@echo
endif
ifneq ($(HAS_PLUGIN),true)
	@echo " DEPENDENCY ERROR"
	@echo
	@echo "You don't have the grpc c++ protobuf plugin installed in your path."
	@echo "Please install grpc. You can find it here:"
	@echo
	@echo "   https://github.com/grpc/grpc"
	@echo
	@echo "Here is what I get when trying to detect if you have the plugin:"
	@echo
	-which $(GRPC_CPP_PLUGIN)
	@echo
	@echo
endif
ifneq ($(SYSTEM_OK),true)
	@false
endif

